The 22-year-old Brazilian tennis player, currently ranked No. 195 in the world, has defeated top seed Sloane Stephens 6-3, 6-3 to reach the quarterfinals at the Mexican Open.

It’s Haddad Maia’s first victory in seven career matches against players ranked in the top 10.

The fourth-ranked Stephens, the 2017 U.S. Open champion, was making her first appearance in the event since winning the 2016 title.

“It was just a tough match, obviously she played well,” Stephens said. “A tough day. But I’m not too sad about it. I’m just going to go back and work some more, practice some more and get ready for Indian Wells.”

Haddad Maia will face Wang Yafan in the quarterfinals. Wang led Monica Puig4-1 when Puig retired because of an injury.